Indian Journal of Science and Technology

Abstract

Objectives: In this work Setariaverticillata leaf extract was utilized as bioreductant to synthesise Zinc oxide nanoparticles (ZnO-NPs) blended with activated carbon for possible application in electrochemical energy conversion systems. Methods/ Statistical Analysis: Synthesised ZnO-NPs were subjected to various physical characterization techniques. As well as the electrochemical behaviour of the Setariaverticillata activated carbon (SVAC) and nanostructured ZnO composite mixture was studied electrochemical impedance spectroscopy with 0.1 M Na₂SO⁴ electrolyte. Findings: Wurtzite (hexagonal) form of the herb assisted synthesised ZnO-NPs with particles disseminated within the extend of 40-110 nm. The prepared ACZnOnanocomposite electrode exhibits specific capacitance of 264.8 F/cm² at 5 mV/s scan rate. The specific capacitance of the electrodes diminished with increment in zinc oxide substance. The improved electrochemical behaviour of the nanocomposite can be credited to the high electrical conductivity of the activated carbon and electro active. Application/ Improvements: ZnO Setaria assisted activated carbon-ZnO nanocomposite was prepared as a perspective candidate to exhibit its applicability as active materials for electrochemical energy conversion such as super capacitors.

Keywords: AC-ZnOnanocomposite, Nanomaterial, Supercapacitor, Specific Conductance, ZnO